产品全生命周期建模技术研究

在介绍产品模型的基础上,通过对常规机械ＣＡＤ／ＣＡＭ采用串行工作方式所产生弊端的分析和应用并行工程、虚拟制造等先进技术来缩短新产品开发周期的阐述,证明建立产品全生命周期模型在新产品开发过程中具有重要意义,最后介绍了在建立全生命周期模型中所用于的基于特征、参数化、自顶向下设计、面向装配设计、基于ＳＴＥＰ产品数据交换标准等新技术。     

Integration of manufacturing-induced properties in product design

Guidelines of the design for manufacturability (DfM) hardly regard neither specific positive effects nor additional functional convenience achievable by specific manufacturing technologies. Consequently, opportunities for design quality improvements are wasted. The paper introduces a new approach in terms of connecting methods of product design, mathematical optimization, process planning and forming technologies, which inherently change material properties of the workpiece. By providing manufacturing-induced properties at an early stage of product design additional functionality can be generated and product complexity reduced. Due to the algorithmic approach design solutions based on different manufacturing technologies can be efficiently compared in mature development stages.     

Coevolution of digitalisation,organisations and Product Development Cycle

Over the past 70 years, product design has undergone many important changes due to the impact of contemporary digital technologies (i.e. digital design).To support digital design and information flow throughout the product lifecycle, the digital-driven technologies currently in use rely on the evolution of CAD and PLM systems to address new design and manufacturing challenges generated by the new era of 4.0 digital transformation.This paper will discuss the past and present coevolution and shortcomings within industrial organisations, the digital technologies employed in the product development cycle and will illustrate the current challenges and future prospects of the digital thread for design.     

Assembly Reliability Evaluation Method (AREM)

This paper proposes a new design system for assembly quality evaluation called AREM. It is based on the assembly fault occurrence model reflecting both product design and assembly shops. It prevents faults in assembly shops related to the design of the product. The system has three distinctive features: estimation of faults caused by design, extraction of faulty parts or faulty operations, and analysis of fault phenomena. AREM can distinguish the responsibility of the design and the shop quantitatively. This method is being used for various products in practical production lines, and has proven to be effective.     

参数化槽钢孔型计算机辅助设计技术研究

基于参数化思想,对槽钢孔型计算机辅助设计技术进行了研究,同时使用Delphi对AUtoCAD进行了二次开发。结合武钢万能轧机槽钢孔型系统,介绍了系统应用实例。该系统可以有效缩短新产品的开发周期、提高孔型设计的可靠性、降低轧制时的各种消耗、加快新产品的研发速度。     

浅析U形件回弹

回弹是冷冲压成形过程中不可避免的物理现象,一直是影响、制约模具和制件质量的重要因素。回弹给模具设计和制造带来了很大的困难,常常需要采用反复试模、修模及成形后人工矫正的方法才能制造出符合要求的制件。通过分析金属板材弯曲回弹的现象、影响因素,总结了控制弯曲回弹的具体措施和方法,解决了实际生产中的问题。     

Incorporating Lifecycle Considerations in Axiomatic Design

At the outset of designing a new product, knowledge about the product is limited, but the designer has a considerable amount of design freedom. Considering the environmental implications of a product design early in the design phase is a crucial step in achieving an environmentally efficient product. By applying the axiomatic approach to a product's design, the designer can ensure that the final embodiment of the product or service satisfies the obligatory and necessary set of functional requirements and constraints, including environmental issues. In this paper we show how the integration of environmental considerations early in the process of axiomatic design can lead to the development of an environmental-friendly product or service. The paper demonstrates an artificial case study of designing a modern manufacturing system. A major issue investigated in this work is the possibility of assessing environmental performance (or environmental-related information) already in the preliminary stages of the design process. An upper bound for the probability of a product failing to satisfy environmental requirements is introduced. In addition, the suitability of lifecycle analysis to the assessment of products during the process of axiomatic design is discussed.     

A New Approach for Robust Design of Mechanical Systems

Robust product design aims to develop a product that satisfies design requirements while ensuring minimal effects of environmental variability on product performance. Environmental variations may come from raw materials, manufacturing processes, and/or operational environments, which can cause deviations of product functions. This research can verify that the independence axiom can lead to a robust design, while robust designs do not necessarily require functional independence. Thus, designs can be divided into three categories - feasible designs, robust designs and ideal designs. In the first level of the design process, the designers should generate a feasible design, then seek to acquire robustness, and finally determine the possibility of independence. Axiomatic design aims to achieve the independent design; the traditional robust design is an experimental method that may not reach design independence. The proposed approach introduces the integration of the independent analysis that is based on axiomatic design, with the robust analysis that is based on the traditional robust technique. It can help the designer to seek an ideal design or a robust design in respect to the specific design conditions.     

Knowledge transfer mechanisms for advanced surface engineering technologies

Abstract

A breakthrough in the area of PVD/CVD coating technologies, as in other surface engineering technologies, requires not only technical innovation but also innovative technological and organisational support. The cohesion of these diverse areas forms a basis for obtaining theoretical and physical models, which give rise to prototypes for the rapid application of breakthrough solutions. Mechanisms and structures aimed at reaching breakthrough research objectives are presented, taking as an example the investigation and application of new materials, particularly using surface engineering PVD plasma technologies. The advanced technology of thermal barrier coatings (TBC) is described and the associated process development, including the design and construction of a unique hybrid device for TBC creation, are presented. By means of this example, a combination of breakthrough and incremental research is explored and a real path for balancing research and knowledge transfer, leading to innovative solutions and technologically advanced product application, is demonstrated.     

A novel paradigm for managing the product development process utilising blockchain technology principles

The product conceptualisation, design and manufacturing phases are becoming increasingly complex, since more available resources, stakeholders and sophisticated technologies are involved during product development. The exchange and management of product-related information is often a challenging task, affecting significantly the intellectual property protection process as well as the distinction of roles among stakeholders. This paper proposes a conceptual framework that utilises blockchain technology principles for managing product development information and processes with the goal of providing new approaches to extending the functionality of product data management systems. A test case focusing on products developed with additive manufacturing technologies is presented.     

快速缸体铸件开发

以缸体铸件开发为例，应用CAD／CAE／CAM并行工程、虚拟制造和先期产品质量策划等现代技术和方法进行复杂铸件缸体的快速开发，结果表明：运用现代设计、制造和管理技术，可使产品开发速度加快，质量提高，成本降低。     

Predicting the total environmental impact of product technologies

Many eco design tools and product assessment methods have been developed to improve the environmental performance of products during design stage. Despite the efforts made at the product level, environmental impact in our society is increasing due to environmental impact associated with increased product volume. This article presents a new methodology for product life cycle design assessment to predict the total impact caused in the society by forecasting the market growth of emerging product technologies. A number of products were used to prove the validity of the proposed model and demonstrate the usefulness of the methodology.     

可重构机床设计基本理论研究

为了迅速响应市场/客户需求的频繁变化,机床必须具备可重构性,即对变化的需求能快速、经济地转换以重新配置的能力.文章从实现机床整个生命周期的可重构性角度出发,阐述了可重构机床设计的基本原理,在此基础上,提出了一种基于工艺规划和机床配置并行完成的可重构机床设计方法学,并分析了可重构机床设计过程中几个相互关联的子过程.最后,针对各子过程的实现,较为深入地探讨了其理论和方法,即设计可重构机床的几个关键使能技术.     

Adaptable Design

Increasing competition for better product functionality, quality, features, customization, environmental friendliness, lower cost and shorter delivery time presents unprecedented challenges for product manufacturing enterprises. These challenges cannot be completely addressed by advanced manufacturing technologies alone as some of which are originated from product design. Advanced design technologies and tools for early product design processes are critically needed where most important decisions are made with respect to the product functionality, quality, manufacturability, cost and environmental performance. This paper discusses adaptable design (AD) as a design paradigm for both business success and environmental protection. Adaptable design aims at developing products that are adaptable in their design and/or their production. Adaptability is defined as the extension of the utility (service) of products. Two types of adaptabilities are proposed as product adaptability and design adaptability. Two types of design adaptations are also identified, which include foreseeable specific adaptations and unforeseeable general adaptations. The former can be described by specific adaptability and the latter by general adaptability. Three key elements of AD are presented including functions independence, a measure of adaptability and a function based design process model of the AD. Based on these concepts and design objectives, adaptable design methods and general design guidelines are proposed. Examples are included to illustrate the concepts, design methods and guidelines.     

Robust technology chain design: considering undesired interactions within the technology chain

Existing methodologies in technology chain design are used to plan the deployment of manufacturing technologies under consideration of interactions between these technologies and workpiece properties. Present methodologies focus on workpiece characteristics which the technologies are designated to change. However, workpiece properties can also be negatively affected because of interactions between the manufacturing technologies and features which the technologies are not supposed to change. These undesired interactions can cause a lower quality of the produced parts and an increased amount of defective parts. In this paper, a new methodology is presented which enables the user to identify undesired interactions during the technology chain design process. Firstly, the product to be manufactured is analyzed and described as a set of individual features. Secondly, feature-specific technology chains are designed under consideration of possible undesired interactions. Thirdly, the individual feature-specific technology chains are merged to generate a robust technology chain for the manufacturing of the analyzed product. Since undesired interactions usually occur during production ramp-ups for the first time, the methodology is applied to a case study concerning a ramp-up in the automotive industry. In this context, improving the process stability by preventing the occurrence of undesired interactions is of high economic importance.     

产品设计质量综合评价的理论研究

随着市场竞争的加剧和各种先进技术的应用,尤其是并行工程和产品并行设计技术的应用,产品设计质量已不再用是否满足设计任务书中规定的性能指标来衡量,而是从市场／用户、技术、经济、环境等多个方面来评价产品设计质量的优劣。本文提出了产品设计质量综合评价理论与体系,从而实现了从多方位、多层次对产品设计质量的全面综合评价     

基于Internet的客户参与设计的关键技术研究

详细论述了客户参与设计的概念、原理、方式以及实施方法等方面的关键技术，构建了产品族网络平台的系统结构图，从而为研究客户如何参与设计及客户参与设计系统的开发奠定了基础。     

面向产品反求的CAD/CAM一体化系统的研究

反求工程是一种新型生产力的象征 ,对提高企业产品开发能力和市场竞争力具有十分重要的意义。本文在对反求工程关键性技术进行分析和研究的基础上 ,提出了几种面向产品反求的CAD/CAM一体化方案 ,为实现产品的快速设计、快速成型、快速制造提供了可行的框架。